Question # 1

A food chemist wants to create the odour of pineapples for a product. An ester with this odour has the formula C₃H₇COOC₂H_5.Which pair of reagents would produce this ester

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C₂H₅CI and C₃H₇COOH

C₂H₅OH and C₃H₇CONH₂

C₂H₅OH and C₃H₇COOH

C₃H₇OH and C₂H₅COCI

Aldehydes is distinguished from ketones by using

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Tollen's reagent

Benedict reagent

Fehling solution

All of the above

Hydrogenation of bezoyl chloride in presence of Pd on BaSO₄gives

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Benzyl alcohol

Benzaldehyde

Benzoic acid

Phenol

Self condensation of acetaldehyde in the presence of dilute alkalies gives

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An acetal

An aldol

Mesitylene

Propionaldehyde

The carbon atom of a carbonyl group is

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Sp hybridized

Sp²hybridized

Sp³hybridized

None of these

Which of the following reactions is used for detecting presence of carbonyl group?

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Reaction with hydroxylamine

Reaction with hydrazine

Reaction with phenyl hydrazine

All

The carbon of a carbonyl group is:

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sp hybridized

sp²hybridized

sp³Hybidized

None of these

Which of the following will have the highest boiling point

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Methanol

Ethanol

Propanal

2-hexanone

Acetone reacts with HCN to form a cyanohydrin. It is an example of

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Electrophilic addition

Electrophilic substitution

Nucleophilic addition

Nucleophilic substitution

Propyne on hydrolysis in presence of H₂SO₄and HgSO₄gives

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Acetaldehyde

Acetone

Formaldehyde

None

Cannizzaro's reaction is type of reaction:

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Self oxidation-reduction reaction

Disproportion reaction

Addition

A and B

What is formed when propanone is refluxed with an anhydrous solution of NaBH₄

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Propanal

Propan-1-ol

Propan-2-ol

Propane

A compound R has all of the following properties. It is neutral; It gives an orange precipitate with 2,4-dinitrophenythydrazine; it evolves hydrogen chloride when treated with PCI₅in the cold What could R be

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During the mechanism of aldol condensation a/an ______ is formed

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Oxide

Alkali

Alkoxide ion

None of these

Formaldehyde is used to make

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Plastics

Medicine

Antiseptic

All of these

Acetone reacts with HCN to form a cyanohydrin. It is an example of

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Electrophilic addition

Electrophilic substitution

Nucleophilic addition

Nucleophilic substitution

Which of the following in incorrect?

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FelCl₃is used in the detection of phenols

Fehling solution is used in the detection of glucose

Tollen's reagent is used in detection of unsaturation

NaHSO₃is used in the detection of carbonyl compounds

A nucleophilic reagent will readily Attack

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Ethylene

Ethanal

Ethanol

Ethylamine

Reductive ozonolysis of benzene produces

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Acetone

Maleic anhydride

Phthalic acid

Glyoxal

Aldehydes are produce in atmosphere by

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Oxidation of secondary alcohols

Reduction of alkenes

Reaction of oxygen atoms with hydrocarbons

Reaction of oxygen atoms with ozone

Which of the following reagents is used to distinguish acetone and acetophenone

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NaHSO₃

Grinard reagent

Na₂SO₄

NH₄Cl

The product of the reaction between propanone and HCN is hydrolysed under acidic conditions. What is the formula of the final product

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CH₃CH(OH)COOH

CH₃CH₂CH(OH)COOH

(CH₃)₂C(OH)COOH

CH₃CH₂CH₂COOH

Reaction of Grignard's reagent with formaldehyde gives:

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pri-alcohol

sec-alcohol

ter-alcohol

carboxylic

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Br_2(aq)

2, 4-dinitrophenylhydrazine

NaBH

Tollen's reagent

Acetone is prepared by

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Oxidation of n-propyl alcohol

Oxidation of acetaldehyde

Pyrolysis of calcium acetate

Pyrolysis of calcium acetate as well as acetic acid

Wolf-kishner reduction is used for the reduction of

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Nitro compounds

Carboxylic acids

Carbonyl compounds

Olefins

In which reaction, aromatic aldehyde is treated with acid anhydride in the presence of corresponding salt of the acid to give unsaturated aromatic acid?

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Friedel-Crafts reaction

Perkin's reaction

Wurtz reaction

None of these

Benzophenone can be converted into benzene using

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Fused alkali

Anhydrous AlCl₃

Sodium amalgam in water

Acidfied dichromate

Cannizzaro's reaction in not given by

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Formaldehyde

Acetaldehyde

Benzaldyhyde

Trimethylacetaldehyde

Wacker method involves the conversion of alkene using PdCl₂into corresponding

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Alcohol

Ketone

Aldehyde

Ether

The color of ppts formed by Benedirct's test is

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Brick red

Wine red

Yellow

Orange

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ECAT Chemistry Chapter 23 Aldehydes and Ketones Online Test MCQs With Answers

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